Re: RMAN performance problems

We've seen RMAN consume huge amounts of CPU when BACKUP_TAPE_IO_SLAVES = TRUE. We set it to FALSE and are living happily ever after with better-behaved, less hoggish RMAN jobs...
It only slightly improved the speed of backup, but it vastly improved CPU consumption during backups. Not sure which problem you might be experiencing...

I was wondering if anyone can give me some suggestions on an RMAN =
performance problem we are having. Every time our RMAN backups run, we =
have performance problems with slow logins to one of our databases, =
which lasts approximately 1 to 4 minutes. Due to the fact that the =
problem, and the recovery from the problem happens so quickly, it is =
difficult to pin down. I would appreciate any suggestions on how to =
capture this problem in such a short time. Has anyone experienced =
performance problems when RMAN backups run?